my new 06 after breaking competely stock air/ fuel open a half turn more then stock...runs the balls and power everywhere...half turn open A/F mixture took the unhappy throttle between 1500 and 2000 rpm when pulling away from a stop..very impressed with high speed stability and cornering...no poping or backfire through air box....leaving it alone carbs will be fine for many many miles.....still looking to find a max that has jet kit and pipes in boston area to prove stcck setup has more pulling power in the street or highway...coffee will be on me